Edit: http://www.fallout3nexus.com/downloa...e.php?id=12056 I highly, highly recommend this too. It replaces most of the stock textures in the game. Not as high quality as downloading the rocks/terrain/rivet city mods by themselves, but it's much more comprehensive; it covers everything from fridges to rocks.

Have fun with FO3... such an awesome game, and you'll have absolutely no issues playing it on your setup